Check-valve.



W. LAMB & J. S. SHIELDS.

' CHECK VALVE. APLwATIoN FILED JUNE 23, 1910.

' In I/ I I I amp/Moms l vilt'maoao v I f A f size/dd;

attbwaqo Patented Dec. 5, 1911.

A j i UNITED 7' -sTAT-Es PATENT OFFICE.

wrnnmrams "AND .1031? s. SHIELDS, or nn'rnorr, mcmoan.

JOHN' S. SHIELDS," citizensof: the United. :States, residingat Detroit,- 1 n ofW'ayne and State of Michigan, have 1n- Be .it known that we, -WILLIA LAMB and the county vented certain new. and useful Improvements in Check-Valves; and we'do declare' .the following to be a full, clear, and exact description of the invention,- such as will enable others skilled in the art to which it appertains to make and use the same;

This invention relates to improvements in I check valves.

' same is revolved when lifted from its seat The object of the invention is to provide a check valve having means whereby the by the fiuid passing therethrough thuscausing the valve to close in a. different posltion each time the same-is opened.

With this and other objects in view the invention consists of certain novel features of constructlon,- combinatlon and arrangement of parts as will be more fully described and particularly pointed out in the cause the same to properly engage its seat appended claims.

In the accompanying drawings; Figure 1 is a vertical sectional view through a valve casing showing our improved Valve applied thereto. Fig. 2 is a sideview of the valve removedjFig. 3 is an end view of the inner end of the valve.

Referring more particularly-to the drawings 1 denotes the'upper or disk portion of the valve said portion being of the usual or any suitable construction and is here shown as being provided with a beveled outer edge to engage the seat 2 of the valve, casing. On the under side of the disk'l is formed a series ofdownwardly projecting spirally disposed blades 3 four of which are shown in the present instance as the preferred num-- ber; Any number of blades may,

however, be employed.

1n its opening and closing movement to cH'Ecx-vaLvn.

- the pressure of v Patented Dec.- 5, 1911.

when closing. I By arrangingthe blades 3 1n spiral form it will be readily seen that the 'fiu'id when lifting the valve and passing through'the valve casing will; engage the radial blades and thereby revolve the valve thus seat in a different position each time the valve is closed.

' In the upper portion of each of the blades 3 adjacent to the lower side of the disk .1 is formed a slot or elongated passage through which the fluid is permitted to circulate or pass around under the disk thereby causing thepressure or flow'of the fluid to more readily revolve the valve as saidfiuid passes through the seat and casing. By means of our improvement the valve when lifted from its seat is prevented from closing in the same position and thus hammering itself into an uneven shape and causing the same audits seat to wear evenly at all points.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will readily understood without requiring a more extended explanation. Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantag es -of this invention as defined in the appended claims.

Having thus described our we claim is:

1. In a valve,.a disk, 9. series of spirally disposed blades extending from one face thereof, said blades havingelongated passages extending transversely therethrough intermediately of their widths adjacent said disks to permit the fluid to circulate throu h the blades and engage therewith to fac' iinvention what tate the revolving action of thefluid on the blades.

2.- In combination with a valve casing and seat thereof, of a disk revolubly mounted in said seat and adapted for vertical movement, a plurality of spirally arranged blades forming a continuation of the disk, set our hands in presence of two subscribing said blades having elongated passages exwitnesses. tending-transversely therethrough intermev WILLIAM LAMB dlate their wldth ad acent the disk whereby 5 the fluid is uninterruptedly caused to pass JOHN SHIELDS through the valve when unseated and in con- Witnesses: tact with the entire surface of the blades. JAMES RULE,

In testimony whereof we have hereunto MALCOLM G. EWER. 

